-99.49% is the change from 990 to 5
Calculation steps:
[( 5 - 990 ) ÷ 990] x 100 = -99.49%
Formula
Percentage change = [(5 - 990) / 990] x 100
Subtract the new number by the original number
5 - 990 = -985
-985 ÷ 990 = -0.9949494949494949
-0.9949494949494949 x 100 = -99.49%